Power-driven calculating machine

ABSTRACT

A power-driven calculating machine with a shiftable multiplier register containing a multiplier, a counter and a setting pin carriage with a multiplicand, which includes a presetting means connectable with the setting pin carriage by actuation of a preset operating means after insertion of the multiplicand in the setting pin carriage but before operation of the multiplication means, said presetting means being capable upon adjustment of the setting pin carriage after the multiplying operation, of stopping the carriage in the decade position occupied after insertion of the multiplicand but before the multiplying operation, and operable by preselection operating means for shifting said setting pin carriage so that in the shifting direction after insertion of the product in the counter but before a definite number of decade positions are produced by adding and subtracting means so that the multiplicand can be positively or negatively added to the product in the counter in a definite decade position in relation to said product. The machine will be able to permit the multiplication of two factors by one another to obtain a product and then positively or negatively add one factor to the product in a position which has been decade shifted a definite number of steps in relation to the product.

o United States Patent 1 3,568,921

[72] Inventor John Lydfors 3,406,899 10/1968 Bress lein et a1 235/60 Malmo, Sweden 3,495,771 2/1970 Lydfors 235/60 [21] p 826862 Primary Examin erStephen J. Tomsky [22] Flled May 1969 Attorney-John Lezdey [45] Patented Mar. 9, 1971 {73] Assignee Aktiebolaget Addo Malmo, Sweden ABSTRACT: A power-driven calculating machine with a P110111) 1963 shiftable multiplier register containing a multiplier, a counter Sweden and a setting pin carriage with a multiplicand, which includes 7,102/68 a presetting means connectable with the'setting pin carriage by actuation of a preset operating means after insertion of the multiplicand in the setting pin carriage but before operation of the multiplication means, said presetting means being capable [541 CALCULATING MACE inffi iliii il fii $50853???fl?!il' fiihi fiifiefi iifil i 3 Claims 12 Drawing Figs occupied after insertion of the multiplicand but before the UsS- Cl- 60, o eration and operable preselection operating 235/53 means for shifting said setting pin carriage so that in the shift- [51] Int. Cl. G06c 15/12, ing direction after insertion of the product in the counter but G069 13/00, G069 23/00 before a definite number of decade positions are produced by ofseflrch 63, and subtracting means so that the multiplicand can be positively or negatively added to the product in the counter in 56 R I Ci ed a definite decade position in relation to said product. 1 e t The machine will be able to permit .the multiplication of-two UN STATES PATENTS factors by one another to obtain a product and then positively 3,032,261 5/1962 Lydfors 235/60 or negatively add one factor to the product in a position which 3,350,006 10/1967 Reynolds... 235/63 has been decade shifted a definite number of steps in relation 3,402,885 9/ 1968 Haberkorn 2135/60 to the product.

PATENTED MAR 91971 SHEET 02 0F 10- PATENTED m 9 l97| SHEET 0 3 OF PATENTED HAR 9 I9?! SHEET 0 4 OF 10 PATENTED MAR 9mm US UP sum PATENTED MAR 919m SHEET 07 or PATENTED m 9 ISYI SHEET 0 8 BF PATENTEU m 9197:

SHEET 7 09 0F 10 MAE PATENTED HAR 9 l97| SHEET 1 0 [IF POWER-DRIVEN CALCULATING MACHINE This machine relates to power-driven calculating machines.

In certain types of calculations it is desired to multiply two factors by one anotherto obtain a product and then positively or negatively add one factor to the product in a position which has been decade shifted a definite number of steps in relation to the product. A typical example is the calculation of a discount from or an increase of an amount and the amount changed by the discount or increase. In conventional powerdriven calculating machines such calculations involved'considerable work for the operator, and the present invention has been developed in order to bring about a great reduction of thiswork.

To this end, the invention provides a device in a powerdriven calculating machine which has a multiplier register adapted to receive a'multiplier, a counter, a setting pin carriage adapted to receive a multiplicand and shiftable into different' decade positions in relation to the counter in one direction, the shifting direction, by spring force and'in the other direction, the restoring direction, by-motor power under zeroization of the setting pin carriage by a zeroizing mechanism, a multiplication mechanism which can by a mul tiplication operating means, multiply the multiplicand by the multiplier under'decade shifting 'of the setting pin carriage and enter the product into the counter, a preselecting mechanism which on multiplication is operable before the actuation of-the multiplication operating means by means of a preselection operating member for retaining the product in the counter after a multiplying'operation as a subtotal, and an adding mechanism operable by addition and subtraction-operating means for positive or negative adding of a number inserted in the setting pin carriage to a number in' the counter. The characteristic features of the device according to the invention reside in that the setting pin carriage is 'connectable with a presetting mechanism, by actuation of a preset operating means after insertionof the multiplicand'in the setting pin carriage, but before operation of the multiplication operating means, said presetting mechanism is adapted, upon adjustment of the settin'g'pin carriage in the restoring direction after the multiplying operation, to stop thecarriage in the decade position occupied after insertion of the multiplicand but before the multiplying operation, and that the setting pin carriage is shiftable, by the action of a shift mechanism operable by the preselection operating means, in the shifting direction a definite number of decade positions after insertion of the product in the counter but before the adding mechanism is enabled by some of the addition and subtraction operating means in order that the multiplicand shall be positively or negatively added to the product in the counter in a definite decade position in relation to said product.

An embodiment of the invention will now be more fully described with reference to the accompanying drawings in which:

FIG. 1 shows some mechanisms of a device according to the invention in a starting position;

FIGS. 2 and 3 show consecutive operating positions of the mechanisms in FIG. 1;

FIG. 4 shows other parts of the device according to the invention in an initial position;

FIGS. Sand 6 show consecutive operating positions of the parts shown in FIG. 4;

FIG. 7 shows a setting pin carriage and some associated operating means ina'n initial position;

FIGS. 8-12 show some mechanism parts in the initial position shown in FIG. 1.

The embodiment of the invention, chosen by way of example, is applied to a prior-art, power-driven d'riven adding, for instance ADDO-X made by Addo Aktiebolag, Sweden, machine, having a setting pin carriage, a printing register and an automatic multiplying mechanism, and serves to facilitate the work of the operator in making calculations of discounts or increases, the rule being adopted that the percentage should be introduced into the machine with two decimals'in- On discount calculation:

dicated. By way of example, the machine delivers the following printed tape On increase calculation l0 1391156.25 x 1743843.75 x

The procedure in making the calculations is as follows. To

begin with, the operator enters on the keys of the machine the percentage 11.25 into the setting pin carriage l of the machine (FIG. 7) and actuates a multiplication key (not shown), whereby the machine in a known manner prints the first line of the above listing and inserts the percentage in the multiplier register (not shown) of the machine, while zeroizing LII the setting pin carriage. Then the operator keysthe amount of 156.75 by means of'the digit keys of the machine into the;

setting pin carriage 1 thereof, whichis thereby shifted'in a known manner throughfivedecade steps (correspondingto the number of digits in the amount) to the left as viewed in- FIG. 7 from the initial position shown therein, by the action of a spring 2. Then, before the operator and in a conventional manner, the operator actuates a multiplication operating means in the form of an equals key" (not-shown).forstarting an automatic multiplying operation,- in which the machine multipliesthe multiplicand, that is, the amount keyed into the setting pin carriage, bythe multiplier, that is the percentage, contained in the multiplier register, under decade shifting of the setting pin' carriage 1 through four decade steps (corresponding to the number of digits in the multiplier) to the left as viewedin FIG. 7 and with insertion of the product in the counter (not shown) of the machine, and which multiplying operation in machines of the type here contemplated is normally concluded with a total taking operation, in which the 40 product obtained in the counter is printed, the setting pin carriage is restored by motor power to an initial'position with zeroization thereof. Also, the counter is zeroized, and the operator actuates on one handa preset operating means in the form of a p'ercentagekey 3 FIGS. l3), and on the other setting pin carriage at the end of the multiplication not beingrestored to initial position but to the decade position which the carriage occupied after insertion of the multiplicand but before the multiplying operation so that the multiplicand, that is the amount of 156.75 entered into the carriage, is kept therein after the multiplying operation. Also, the previous depression of the preselecting key 4 resultsin the total taking operation normally effected at the end of the multiplying operation being converted by the preselecting mechanism into a subtotal taking operation, that is, the product is printed as a subtotal according to line'3 of the above example andthe 6 5 counter is not zeroized but retains the product in it, and that the shifting mechanism actuated by means of the preselecting key 4 shifts the setting pin carriage at the end of the multiplication operation through four decade steps to the left as viewed in FIG. 7 (since the percentage is expressed in tenthousandths of a unit). A per se known zero fillout mechanism at the same time is actuated by the shifting mechanism for the insertion of zeros in the setting pin carriage after the multiplicand in said carriage. The operator then depresses the subtracting key of the machine if' it is a discount calculation, or the adding key thereof if it is an increase calculation so that the machine negatively or positively adds the value in the setting pin carriage, that is, the amount having four zeros after it, to the product in the counter in the correct decade position relative to said product and prints the added value, as will appear from line 4 of the above example. Finally, the operator depresses the total taking key (not shown) of the machine so that the machine prints the value which is contained in the counter and which in point of discount calculation is the initial amount reduced by the discount and, in point of increase calculation, is the initial amount plus the increase, as shown in line 5 of the above example. In the printing register of the machine the fifth type bar carries an apostrophe after the digit types to mark in the third and fifth line of the above example where the whole number cent amount ends in the printed lines. Due to the invention it has not been necessary for the operator in making this calculation to actuate the digit keys of the machine more than once for keying the percentage and once for keying the amount. Also, it has not been necessary for the operator to see to it that the discount or increase is added in the correct decade position to the initial amount. To attain this considerable facilitation of the calculating work the operator only has to actuate a single control key, the percentage key 3, in addition to those control keys which he has to actuate in making the corresponding calculation in prior-art machines.

After this orientation as to the procedure in making discount or increase calculations I shall describe the mechanisms which according to the invention have been provided in a prior-art adding machine to realize the results accounted for above.

In FIGS. 1-3 is shown a sighting rod 5 which in a known manner is fixedly connected to the setting pin carriage 1 shown in FIG. 7 and thus partakes in the movements of said carriage in order to indicate in a known manner the position of the setting pin carriage with the aid of a sight 6 provided on said bar 5 to the machine operator through a window in the casing (not shown) of the machine. As will appear from FIG. 7, the setting pin carriage l in a conventional manner has a mounting shaft 7 on which is mounted a guide pulley 8 which during the movements of the carriage runs in a slot 9 is indicated by dash-and-dot lines and is provided in the machine frame (otherwise not shown). The-sighting rod 5 is fixedly connected to the setting pin carriage in that it engages with the shaft 7, as will appear from FIG. 7, where a length of the rod 5 is shown, while FIGS. 1-3 do not show any part of the setting pin carriage except for the shaft 7. FIG. 1 shows the parts in initial position with the setting pin carriage and thus also the rod 5 shifted as far as possible to the right. This position is occupied by the parts after the percentage 1 1.25 of the above example has been keyedinto the machine multiplier register (not shown) and printed. The left-hand end portion of the sighting rod 5 in FIG. 1 has at the underside a number of recesses 10 which are arranged with a spacing corresponding to one decade step of the setting pin carriage 1. An operating lever 12 and aslide 13 are mounted on a pivot 11 secured in the machine frame (not shown). At the right-hand end in FIGS. l-3, the slide has an abutment 14, a slot extending from said end and receiving the pin 11 so that the slide is displaceable on the pin. At the left-hand end, the slide has a lug 15 for engagement in some of the recesses 10 in the sighting rod 5 for coupling the slide to the setting pin carriage, and a pin 16 serving to disengage in a known manner a motor driven return hook (not shown) from the setting pin carriage to interrupt the return of the setting pin carriage by means of the machine motor in a decade position defined by the position to which the slide 13 has been moved. Thus decade position is a position other than the initial position of the setting pin carriage. The right-hand end of the operating lever 12 in FIGS. L ---3 is pivotally connected to the stem 17 of the percentage key 3 by means of a pin 18, and the left-hand end of the lever embracesthe slide 13 by means of two lugs 19 so that the slide has to partake in the swinging movements of the lever about the pivot 1 1.

When the percentage key 3 is not depressed and the parts occupy the positions shown in FIG. 1, the lug 15 of the slide 13 lies below and is disengaged from the sighting rod 5, and the pin 16 of the slide is in inoperative position without being able to actuate the return hook (not shown) of the setting pin carriage. After the insertion of the percentage the operator enters the amount 156.75 into the setting pin carriage, the latter can thus move unimpededly through five decade steps to the left, as viewed in FIGS. 1 and 2, while taking the sighting rod 5 along to the position shown in FIG. 2. When the operator then depresses the percentage key 3 against the action of a return spring 25 (FIG. 8), the lever 12 connected by means of the pin 18 to the stem 17 of the key is swung clockwise from the position in FIG. 1 to the position in FIG. 2 about the pivot 11. The lugs 19 of the lever 12 take the slide 13 along to the position in FIG. 2 so that the lug 15 of the slide engage in one of the recesses 10 of the sighting rod 5 for coupling the slide to the setting pin carriage and the pin 16 of the slide is adjusted into operative position to actuate the return hook of the setting pin carriage when said carriage is returned. At the depression of the percentage key 3 said key islocked in depressed position by a locking lever 20 FIGS. 1-3 and 8) which is mounted on a pin 21 secured to the machine frame and engaging in a slot 22 in the key stem 17 for guiding said stem. To this end the key stem 17 has a pawl 23 and the lever 20 has a stop lug 24 which under the action of the return spring 25, expanded between a lug 26 on the lever 20 and a pin 27 on the key stem 17 in the initial position shown in FIGS. 1 and 8, bears against the inclined edge of the pawl 23 and upon depression of the percentage key snaps over the abrupt edge of the pawl into the position shown in FIG. 2 for locking the key 3 in depressed position.

At the depression of the percentage key 3 a pin 28 secured to the key stem 17 and engaging in an arcuate slot 29 of a feed lever 30 FIGS. l-3 and 9) swings the lever 30 clockwise from the inoperative position shownin FIGS. 1 and 9 to the operative position shown in FIG. 2. The feed lever 30 is mounted by means of a pin 31 on a tabulating key 32 FIGS. I3 and 9) which is mounted on the machine frame by means of a pin 33. When the feed lever 30 occupies the inoperative position shown in FIGS. 1 and 9, a pin 34 of said lever lies outside the path of a dog 35 disposed on one arm of a yoke 36 which is pivotally mounted on a shaft 37 in the machine frame. When the percentage key 3 has been depressed and the feed lever 39 occupies the operative position shown in FIG. 2 the pin 34 of the lever lies in the path of motion of the dog 35 the dog 35 so that at the counterclockwise pivotment (described in the following) of the yoke 36 to the position in FIG. 3 said dog 35 takes the feed lever 30 along.

A U-shaped member 39 and a lever 40 are pivotally mounted on a pivot 38 FIGS. 1 and 10) in the machine frame. A spring 41 (FIG. 10) in the machine frame. A spring 41 (FIG. 10) expanded between the U-shaped member 39 and the lever 40 tends to swing the Ushaped member clockwise about the pivot 38 while a strong spring 42 retains a roller 43 on the lever 40 in engagement with a cam projection 44 of the tabulating lever 32. In the initial position shown in FIGS. 1 and 10 a clockwise pivotment of the U-shaped member 39 is prevented by a nose 45 on one limb of the U-shaped member engaging the pin 28 on the stem 17 of the percentage key 3. When the percentage key is depressed to the position shown in FIG. 2 the pin 28 leaves the nose 45, the U-shaped member 39 being swung clockwise a short distance to a standby position shown in FIG. 2 in which position a locking projection 46 on one limb of the U-shaped member bears with one side edge against a pin 47 on one arm of the yoke 36 already described.

When the operator depresses the preselecting key 4, the parts taking an initial position in FIG. 4 are transferred to a standby position shown in FIG. 5. The stem 48 of the key 4 has a slot 49 which engages a guide pin 50 secured to the machine frame for guiding the key stem 48 during the up and down movements thereof. The key stem 48 has a further slot 51 which engages a pin 52 on one end of a lever 53 which is mounted on a shaft 54 in the machine frame. A spring 56 expanded between a pin 55 in the machine frame and the lever 53 tends to hold the key 4 in the raised position shown in FIG. 4, in which position, the spring 56 urges the lever 53 against a ratchet 57. Said ratchet is mounted on a pin 58 in the machine frame and is kept pressed in the initial position shown in FIG. 4 against a shoulder 59 of the lever 53 by a spring 61 expanded between the ratchet and a pin 60 in the machine frame. When the operator depresses the preselecting key 4 the lever 53 is swung counterclockwise against the action of the spring 57 as a result of the pin 52 engaging the key stem 48 so that the shoulder 59 of the lever leaves the ratchet 57, the spring 61 swinging the ratchet counterclockwise into engagement with a pin 62 in the machine frame. When the operator releases the key 4 the spring 56 urges the lever 53 against the downwardly directed end of the ratchet 57 above the shoulder 59 so that the key is retained in depressed position, as is shown in FIG. 5. A pin 63 is mounted on the stem of the preselecting key 4 for actuating a lever 64 mounted on the shaft 54. A spring 65 expanded between the pin 58 and the lever 64 tends to hold the lever 64 engaged with the pin .63 of the key stem 48. In the initial position shown in FIG. 4 the lever 64 engages the pin 63 of the key stem 48. When the preselecting key 4 is depressed the lever 64 is swung counterclockwise by the pin 63 against the action of the spring 65 to the standby position shown in FIG. 5. At the right-hand end of the lever 64 as viewed in FIG. 4 there is mounted by means of a pin 66 a dog 67 which a spring 69 expanded between the dog 67 and a pin 68 on the lever 64 keeps engaged with a pin 70.on an arm 71 which is pivotally mounted on the shaft 54. In the initial position shown in FIG. 4, the dog 67 bears against the pin 70 with an arcuate edge 72 above the shoulder 73 of the dog so that said dog cannot be taken along by a counterclockwise swinging movement of the pin 70. At the depression of the preselecting key 4 and the swinging movement of the lever 64 from the initial position shown in FIG. 4 to the standby position shown in FIG. 5, the dog 67 is raised in relation to the pin 70. By the action of the spring 69 the shoulder 73 of the dog 67 snaps over the pin 70, as shown in FIG. 5.

A bellcrank lever 75 is pivotally mounted on a pin 74 FIGS. 4-6) in the machine frame, and one end of the lever 75 is pivotally connected to one end of a link 77 by means of a pin 76. The other end of the link 77 has a bent lug 78 which is pivotally connected by means of a pin 79 to one arm of the yoke 36 already described (see also FIGS. 1-3, 9 and In the initial position shown in FIG. 4 and in the standby position shown in FIG. 5, a spring 81 expanded between the lever 75 and a pin 80 in the machine frame keeps the lever 75 swung clockwise into engagement with a pin 82 in the machine frame. One end of a drive link 84 is mounted on the lever 75 by means of a pin 83, and the other end of said drive link has a drive shoulder 85 and a straight sliding edge 86 connecting on to the shoulder. A spring 89 expanded between a pin 87 on the drive link 84 and a pin 88 on the lever 64 keeps the sliding edge 86 of the link 84 engaged with the pin 88. When the parts occupy the initial position shown in FIG. 4, the shoulder 85 of the drive link 84 is far outside the path of motion of a drive pin 90 disposed on one end of an arm 91 which is rionrotatably secured to a shaft 92. During a printing cycle of the machine said shaft 92 in a known manner is first rotated clockwise and then back counterclockwise through 'a certain angle so that the arm 91 is swung from the position in FIGS. 4 and S to the position in FIG. 6 and back. When the preselecting key 4 has been depressed so that the parts occupy the standby position shown in FIG. 5, the shoulder 85 of the drive link 84 is still outside, but close to the path of motion of the drive pin 90.

The preselecting key 4 upon depression also serves in a known manner to couple an input portion (not shown) of the subtotal-coupling mechanism of the machine with a preselecting mechanism (not shown) which converts the total-taking operation, which is normally automatically initiated at the end of a multiplying operation started by the equals key (not shown) of the machine, into a subtotal-taking operation by swinging said input portion counterclockwise about the shaft 54 FIGS. 4-6) during the total-taking operation and before the printing operation proper by swinging said input portion back to initial position at the end of the printing cycle. The arm 71 shown in FIGS. 4--6 is fixedly connected to said input portion of the subtotal-coupling mechanism so that said arm 71 and the pin 70 thereof, prior to a printing operation during which a subtotal is printed, are swung about the shaft 54 from the position shown in FIGS. 4 and 5 to the position shown in FIG. 6 in order to be returned to initial position shown in FIG. 6 in order to be returned to initial position at the end of the printing operation. Furthermore, an arm'93 having a pin 94 can be swung about the shaft 54. Prior to each printing cycle of the machine said arm 93 is swung counterclockwise from the position shownin FIGS. 4 and 5 to the position shown in FIG. 6. At the end of the printing cycle said arm 93 is swung back to its initial position.

After the operator has entered the amount 156.75 into the setting pin carriage and depressed the percentage key 3 and the preselecting key 4,'thl parts thus occupy the positions shown in FIGS. 2 and 5. When the operator then depresses the equals key, a series of cycles will be performed, as will now be described. I

First, the machine effects the multiplying operation proper during which the setting pin carriage and thus the sighting rod 5 and the slide 13 connected to said rod are shifted in a known manner through a total of four decade steps, that is, one step for each digit of the multiplier 11.25, to the left from the position shown in FIG. 2. When the multiplication is accomplished, the machine automatically initiates a total-taking operation. During this operation, but before the printing operation proper, the setting pin carriage is returned by the machine motor to the right as viewed in FIG. 2. This return movement is interrupted by means of the pin 16 of the slide 13, as already mentioned, when the setting pin carriage again reaches the position corresponding to the positions of the sighting rod Sand the slide 13 in FIG. 2 so that after the return movement the carriage still contains the amount 156.75 with the unit cent digit in position opposite the lowest decade of the counter.

After the setting pin carriage, the sighting rod 5 and the slide 13 have been returned in the manner described to the position in FIG. 2, but before the printing operation proper, the arms 71 and 93 having the pins 70 and 94 are swung in the manner previously described counterclockwise from the position shown in FIG. 5 to the position shown in FIG. 6. At the end of this swinging movement the pin 94 strikes the ratchet 57 and causes it to swing to the position in FIG. 6 so that the spring 56 can return the preselecting key 4 and the lever 53 to raised position. After the pin 94 returns to the initial position in FIGS. 4-5, the ratchet 57 engages the shoulder 59 of the lever 53 by the action of the spring 61. The counterclockwise swinging movement of the arm 71 results, except for the fact that the machine will perform a subtotal-taking operation instead of a total-taking operation, in that the pin 70 of the arm carries the dog 67' along, moving it to the position in FIG. 6 while the lever 64 is swung counterclockwise about the shaft 54. Consequently, the drive link 84 is swung counterclockwise about the pin 83 from the position in FIG. 5 to a position in which the shoulder of the link is in the path of motion of the drive pin on the arm 91.

During the subsequent printing cycle the arm 91, as already mentioned, is first swung clockwise from the position in FIGS. 4 and 5 to the position in FIG. 6, the pin 90 of the arm striking the shoulder of the drive link 84, which shoulder, as already described, has been moved into the path of the pin, whereby the link is moved to the left to the position in FIG. 6. The link 84 will now swing the bellcrank lever 75 counterclockwise from the position in FIGS. 4 and 5 to the position in FIG. 6 against the action of the spring 81, and through the intermediary of the link 77. The lever 75 will swing the yoke 36 clockwise about the shaft 37 from the position in FIG. 2 to the position in FIG. 3.

At this clockwise swinging movement of the yoke 36, the pin 47 of the yoke leaves the locking projection 46 of the yoke 36 so that the spring 41 (FIG. 10) can swing the yoke 36 from the position in FIG. 2 to the position in FIG. 3. The yoke is then applied against the pin 28 secured to the stem 17 of the depressed percentage key 3 beside the nose 45 of the yoke 36 and the edge of the projection 46 of the yoke 36 lies in the path of the pin 47 of the yoke 36 in order to temporarily prevent a complete return swinging movement of the yoke 36 counterclockwise from the position in FIG. 3 for a purpose that will appear from the following description. Moreover, the clockwise swinging movement of the yoke 36 from the position in FIG. 2 to the position in FIG. 3 causes a pin 95 (FIG. 11), which is secured to a stop abutment lever 97 mounted in the frame by means of a journal 96, to slide out of a recess 98 (FIG. 3) in one arm of the yoke 36 to an arcuate edge 99 of the yoke arm, whereby the lever 97 is swung clockwise from the position in FIGS. 2 and 11 to the position in FIG. 3 against the action of a spring 101 (FIG. 11) expanded between a pin 100 of the lever 97 and the shaft 37 of the yoke 36. At this clockwise swinging movement of the lever 97, a stop abutment 102 thereon is swung into the path of motion of the abutment 14 of the slide 13 which occupies the position in FIGS. 2 and 3 and which is connected to the setting pin carriage, as will appear from FIG. 3. Finally, the clockwise swinging movement of the yoke 36 from the position in FIG. 2 to the position in FIG. 3 results in that the dog 35 of the yoke FIGS. 9, l1) strikes the pin 34 of the feed lever 30, which pin occupies the position in FIG. 2, and pulls this lever to the right from the position in FIG. 2 into the position in FIG. 3, the tabulating lever 32 being swung clockwise from the position in FIG. 2 to the position in FIG. 3.

' At this clockwise swinging movement of thetabulating lever 32 from the position in FIGS. 1, 2, 9 and 11 to the position in FIG. 3, a feed pawl 104 pivoted to the lever 32 by means of a pin 103 is shifted to the right from the position in FIGS. 1, 2, 9 and 11 to the position in FIG. 3 in which the nose 105 of the pawl engages behind the abutment 14 of the slide 13. A spring 107 expanded between the feed pawl 104 and a pin 106 in the machine frame keeps the pawl pressed against the stop abutment 102 of the stop abutment lever 97 and the abutment 14 of the slide 13, respectively. Besides the clockwise swinging movement of the tabulating lever 32 from the position in FIGS. 1, 2, 9-12 to the position in FIG. 3 causes the cam projection 44 of the tabulating lever by actuation of the roller 43 to swing the lever 40 counterclockwise about the pin 38 to the position in FIG. 3. This will tension the strong spring 42 expanded between the lever 40 and a pin 108 of a link 109, since the link momentarily cannot move downwards. The link 109, which is movably guided on the lever 40 by means of a pin 110 secured to the lever and engaging in a slot in the lower end of thelink, is hinged by means of a pin 111 to a lever 112 which momentarily cannot swing counterclockwise about its pivot pin 113 secured to the machine frame since the left-hand end of the lever in FIGS. l-3 and 12 engages a pin 114 on the stem 115 of the machine digit key 116 for zero and since the digit keys of the machine in the conventional manner (not shown) are locked against depression during each machineoperating cycle in progress up to the last portion of said cycle.

Before the locking of the digit keys of the machine ceases during the machine's operating cycle, the am 91 starts to swing back counterclockwise from the position in FIG. 6 to the position in FIGS. 4 and 5, and the spring 81 swings the bellcrank lever 75 back clockwise from the position in FIG. 6 towards the position in FIGS. 4 and 5. For the moment, how ever, the bellcrank lever 75 does not altogether reach the position in FIGS. 4 and 5 because the lever when swung will also swing the yoke 36 counterclockwise from the position in FIG. 3 and this swinging movement of the yoke 36 and the lever 75 is interrupted in an intermediary position just ahead of the position in FIGS. 1, 2 and 4, 5, respectively, by the pin 47 of the yoke 36 being applied against the end of the locking projection 46 of the U-shaped member 39. In this intermediary position the dog 35 of the yoke 36 has left the pin 34 of the feed lever 30 because the feed lever 30, the tabulating lever 32 and the feed pawl 104 cannot under the action of the spring 107 partake to an appreciable extent in the return movement of the yoke 36 because the nose of the feed pawl 104 engages the abutment 14 of the slide 13. In said intermediary position of the yoke 36 the pin 95 of the stop abutment lever 97 is still in engagement with the edge 99 of the yoke 36 (although close to the recess 98 of the yoke) so that the stop abutment lever 97 still occupies the position in FIG. 3 with the stop abutment 102 lying in the path of motion of the abutment l4 ofthe slide 13.

When the locking of the digit keys of the machine ceases near the end of the machines' operating cycle, the tensioned spring 42 is capable of depressing the zero key 116 by pulling the link 109 downwards as viewed in FIG. 3 and, thus, is capable of swinging the lever 112 counterclockwise about its pivot pin 113 while depressing the pin 114 and thereby the key stem 115 with the key 116. The depression of the zero key 116 and the swinging movement of the lever 112 release a shifting movement of the setting pin carriage 1 to the left as viewed in FIG. 7 while entering zeros into the lower decades positioned after the amount 156.75 contained in the setting pin carriage. This takes place by means of the mechanism described in the following with reference to FIG. 7.

The setting pin carriage generally designated 1 in FIG. 7 comprises an upper plate 117 and a lower plate 118 which are interconnected by means of transverse stays 119. Movably mounted in conventional manner in the plates 117 and 118 are vertical setting pins 120 which are arranged in a plurality of decade rows each of which contain setting pins for digits 0- --9 and for stepping the carriage. In FIG. 7, setting pins are drawn in five decade rows, but the setting pin carriage normally contains a considerably larger number of decade rows, for example II or 12 rows. In each decade row, as shown at the front in FIG. 7, there is a setting pin for zero. The decade row comprises behind the zero setting pin further setting pins for each of the digits I9, and at the rear a so-called stepping pin which in the embodiment chosen is a setting pin adapted only for stepping the carriage although the setting pin for digit 9 could also be employed to serve as a stepping pin In the initial position shown in FIG. 7, the stepping pin in the setting pin decade row to the far left bears against a fixed abutment 121 and thereby prevents the transport spring 2 from shifting the carriage 1 to the left in FIG. 7. For entering digits onto the setting pins 120 of the carriage there are provided in conventional manner setting pin actuators in the form of levers which are mounted on a shaft 122. For each of the digits 0-9 there is thus provided an actuator lever 123 with an upwardly directed nose 124 which has an oblique cam surface 125 directed to the right in FIG. 7. Each such actuator lever 123 can be swung in an upward direction in a manner known and therefore not shown by depression of the digit key associated with the respective digit on the of l0keyboard of the machine. At the upward swinging of the actuator lever 123, the nose 124 strikes the setting pin associated with the respective digits 0-9 in that decade row of setting pins whose stepping pin bears against the abutment 121, and shifts the setting pin from the inoperative position shown in FIG. 7 to a raised operative position in the conventional manner. There is also provided an actuator lever 126 for the stepping pins. The lever 126 is in the form of a U-shaped member whose arms are mounted on the shaft 122 on each side of the levers 123 for digits 0-9 and whose transverse web portion connecting the arms is in the form of a plate 127 which grasps over the levers 123 for digits 0--9. The lever 126 also has a lug 120 which at the upward swinging of the lever 126 strikes the stepping pin bearing against the abutment 126 and moves said pin upwards so that the spring 2 causes the carriage 1 to shift to the left, as viewed in FIG. 7, until the stepping pin in the decade row to the near right of the stepping pin just actuated will bear against the abutment 121. When some of the levers 123 for the digits 0- --9 are swung upwards by actuation of the respective digit key, the lever 123 by bearing against the plate 127 of the lever 126 will take the lever 126 along so that not only the setting pin provided for the respective digit in the decade row is adjusted to operative position but also the stepping pin in the decade row in question is raised for stepping the carriage 1 by means of the spring 2.

All that which has been described above regarding the setting pin carriage and its operating mechanism is generally known. In the present invention, however, there is a further actuator lever for the stepping pins. This actuator lever 129 is in the form of a U-shaped member whose limbs are mounted on the shaft 122 forwardly and rearwardly of the limbs of the U-shaped lever 126 actuating the stepping pins. The front limb of the lever 129 has a lug 130 which is operable by means of a pin 131 on the lever 112 earlier described. The rear limb of the lever 129 extends to the left as shown in FIG. 7, along the rear limb of the lever 126, and close to the lug 128 of the lever 126 actuating the setting pins said rear limb is provided to the right of said lug 128 with a nose 132 having an oblique cam surface 133. When the so-called-zero fillout lever 129 is actuated through the earlier described swinging movement of the lever 112 simultaneously with the actuation of the lever 123 for zero and the stepping pin lever 126 by the described depression of the zero key 116, the lug 132 of the lever 129 will be moved into the path of motion (which the stepping pins describe during the movement of the carriage 1 under the action of the spring 2) close to that stepping pin' which bears against the abutment 121 and is pressed upwardly by the lever 126. When this stepping pin has been urged away from the abutment 121 the carriage 1 starts to move to the left, as viewed in FIG. 7, by the action of the spring 2. The stepping pins situated to the right of said stepping pin strikes in turn of order the oblique cam surface 133 of the zero fillout lever 129 being moved by said cam surface upwards into operative position so that the carriage 1 will continuously move to the left under the action of the spring 2 until it is arrested since the stepping pins in turn of order are moved into operative position by the cam surface 133 and thus cannot stop the carriage by engaging the abutment 121. At the same time the lever 123 for zero is in raised position so that the zeroizing pins situated to the right of the abutment 121 during the described movement of the carriage in turn of order strike the oblique cam surface 125 of the zero lever 123 and are moved by said cam surface into operative position. This implies that zero is entered into those decade rows of the carriage l which at the start of the described movement were to the right of the abutment 121 and travel past said abutment in the course of said movement.

Before the depression of the zero key 116 and the swinging movement of the lever 112 counterclockwise, as viewed in FIGS. 3 and 7, the amount 156.75 was entered into the setting pin carriage 1 so that the above-described shifting of the setting'pin carriage to the left by means of the spring 2, which shifting movement is released by actuation of the zero key 116 and the lever 112, and during which zeros are entered in sequence into the setting pin decades of the carriage, begins with a zero being entered into the decade to the right of the unity cent digit 5" in the setting pin carriage. Said left-hand shifting movement of the setting pin carriage with the entering of zeros is interrupted after four decade steps in that the slide 13 which is connected to the setting pin carriage and which during the shifting movement of the carriage moves to the left from the position as shown in FIG. 3, strikes the stop abutment 102 of the lever 97, thereby arresting the carriage. After the shifting movement the number 156750000 is' thus contained in the setting pin carriage. The feed pawl 104 (FIG. 3) takes part in the described left-hand shifting movement of the setting pin carriage since the pawl under the action of the spring 107 engages the abutment 14 of the slide 13 connected to the setting pin carriage and takes part in the left-hand movement of the slide, and thus, the carriage while the tabulating lever 32 is swung counterclockwise from the position shown in FIG. 3 by the spring 107. When the setting pin carriage and thus the slide 13 with the abutment 14 have moved approximately 3 xfidecade steps during the described shifting movement, a cam edge 134 of the feed pawl 104 slides against the stop abutment 102 of the lever 97, whereby the pawl is swung clockwise against the action of the spring 107 away from the abutment 14 of the slide 13 so that the pawl 104 and thus the tabulating lever 32 are released from the slide and the setting pin carriage. The feed lever 30 takes part in the counterclockwise swinging movement of the tabulating lever 32 until it is stopped by the pin 34 of the lever 30 striking the dog 35 of the yoke 36 occupying the already described intermedia ry position. This engagement between the dog 35 and the pin 34 interrupts the counterclockwise movement of the tabulating lever 32 in an intermediary position located immediately ahead of the position shown in FIG. 2, in which intermediary position the cam projection 44 of the tabulating lever 32 bare- Iy permits the lever 40 with the roller 43 to return under the action of the spring 42 to the initial position shown in FIGS. 1 and 2, wherein the spring 42 is sufficiently expanded to allow the link 109 and thus the zero key 116 and the lever 112 to return to initial position under the action of return springs (not shown) for the zero key and the actuator levers 123, 126 and 129 shown in FIG. 7. By causing the feed pawl 104 and thereby the tabulating lever 32 to take part in the shifting movement of the carriage in the manner described through four decade steps to the left from the position shown in FIG. 3, it is ensured that the lever 40 and the link 109 and thus the zero key 116 and the lever 112 cannot return to initial position until the carriage has actually been shifted through four decade steps for entering four zeros after the amount 156.75 contained in the setting pin .carriage.

Near the end of the operating cycle terminating the automatic multiplying operation started by means of the equals key and during which cycle the product calculated, that is, the discount or the increase, is printed, and approximately simul-' taneously with the above mentioned cancellation of the locking of the digit keys, the arm 71 and the pin are swung back clockwise from the position shown in FIG. 6 to the initial position shown in FIG. 5 (and FIG. 4). In this movement there are taken along the dog 67 and the lever 64 to the position shown in FIG. 5 by the action of the spring 65. The drive link 84 also is returned substantially to the position in FIG. 5 (it will not be precisely this position since the yoke 36 and thus the bellcrank lever are still swung somewhat out of initial position in that the pin 47 of the yoke 36 engages the locking projection 46 of the U-shaped member 39, as has been described above).

This will have accomplished the calculation and the printing of the discount or the increase, and the parts occupy the positions described. The setting pin carriage contains the number 156750000, that is, the amount entered by the operator and having four zeros following it, so that the amount takes the correct decade position relative to the counter containing the product, that is, the discount or the increase, to permit being positively or negatively added to the product for providing in the counter the amount changed by the discount or the increase. For such addition the operator now starts the machine by depression of the subtracting key (not shown) of the machine if a discount is concerned, or the adding key of the machine if an increase is concerned.

During the operating cycle of the machine thus started, the number contained in the setting pin carriage is positively or negatively added in a conventional manner to the product in the counter under printing of the number entered into the counter from the setting pin carriage. During the first part of this operating cycle the arm 91 and the pin are swung from the position shown in FIGS. 4 and 5 to the position shown in FIG. 6 and return during the latter part of the operating cycle to the position shown in FIGS. 4 and 5. During the latter part of the clockwise swinging movement from the position shown in FIGS. 4 and 5, the pin 00 strikes a pin on the dog 67 engaging the pin 70 in the position shown in FIG. 5 and swings the dog out of engagement with the pin 70. This will make it possible for the spring 65 to swing the dog 67 and the lever 64 altogether back to the initial position shown in FIG. 4, in which the lever engages the pin 63 of thekey stem 48 which has been raised in the manner already described, and under the action of the spring 69 the dog 67 engages with its edge 72 the pin 70. The drive link 84 also takes part in the described swinging movement of the lever 64 under the action of the spring 89, but does not fully reach the initial position shown in FIG. 4 since the yoke 36 as already described still has its pin 47 engaged with the locking projection 46 of the U-shaped member 39.

Atter the adding cycle described the operator initiates a total-taking operation of the machine by depression of the total key (not shown) of the machine. The total-taking operation proper is performed in a known manner by printing of the total contained in the counter, that is, the amount changed by the discount or the increase, and during this operation the parts of the mechanisms described, which have not as yet been fully returned to initial position, are restored to such position. At the depression of the total key said key swings a lever 136 (shown only in FIG. 8) clockwise about its pivot pin 137 which is secured to the machine frame. The lever 136 strikes a pin 138 on the locking lever and swings the lever 20 counterclockwise from the position shown in FIG. 3. At this counterclockwise swinging movement of the locking lever 20 a pin 139 of the locking lever strikes a nose 140 on the U-shaped member 39 and swings said member 39 counterclockwise from the position shown in FIG. 3 to the position shown in FIG. 1 so that the locking projection 36 of the member 39 leaves the pin 47 of the yoke 36 which is thereby swung counterclockwise from the earlier described intermediary position altogether back to initial position shown in FIG. 1 under the action of the spring 81 FIGS. 4-6). At this pivotment of the yoke 36, the bellcrank lever 75 is also swung clockwise fully back to the initial position while carrying along the drive link 84 to the position as shown in FIG. 4. At the described counterclockwise swinging movement of the yoke 36 to the initial position shown in FIG. 1, the pin 95 disposed on the stop abutment lever 97 under the action of the spring 101 (FIG. 11) drops into the recess 98 of the yoke 36 from the edge 99 of said yoke so that the stop abutment lever is swung from the position shown in FIG. 3 counterclockwise back to initial position shown in FIG. 1. At the described counterclockwise swinging movement of the yoke 36 to the position shown in FIG. 1, the dog 35 of the yoke also makes it possible for the pin 34 of the feed lever 30 to move to the left so that the spring 107 is capable of swinging the tabulating lever 32 the last small distance counterclockwise back to initial position as shown in FIG. I. At the described counterclockwise swinging movement of the locking lever 20 and the U-shaped locking member 39, the stop lug 24 of the lever 20 is moved out of the position over the pawl 23 of the percentage key system 17, and the nose 45 of the U-shaped locking member 39 is moved upwardly out of the path of motion of the pin 28 attached to the percentage key stem so that the percentage key 3 is no longer prevented by the locking lever 20 and the locking member 39 from moving upwardly into its initial position as shown in FIG. 1. The return spring (FIG. 8) thus pulls the percentage key stem 17 upwards from the position shown in FIG. 3 to the position shown in FIG. 1. The pin 18 of the key stem 17 now swings the lever 12 counterclockwise about the pivot pin 11 from the position in FIG. 3 to the position shown in FIG. 1 so that the slide 13 is also swung counterclockwise to reposition shown in FIG. 1. The slide is released from the setting pin carriage by the lug 15 of the slide leaving a recess 10 in the sighting rod 5 and the pin 16 of the slide being moved into inoperative position to permit a complete return of the setting pin carriage to its right-hand end position. At the upward movement of the percentage key stem 17 to the initial position shown in FIG. 1, the pin 28 of the key stem also swings the feed lever 30 counterclockwise to the position shown in FIG. 1 simultaneously as the pin 28 places itself in the end of the printing cycle of the total-taking operation, the

depressed total key is released so that the lever 136 is returned counterclockwise to the position shown in FIGJS in which the spring 25 keeps the lug 24 of the locking lever 20 engaged with the inclined edge of the nose23 of the percentage key stem 17. At the end of the printing cycle the setting pin carriage is also returned in a conventional manner to its righthand end position under zeroization of all setting pins in the carriage and the sighting 'rod 5 accompanying the setting pin carriage is returned to the initial position shown in FIG. I.

Thus, all parts have been returned to initial position, and the machine is now ready for a new task.

Although it has been suggested in the embodiment chosen that the percentage is to be entered into the machine with two decimals so that after the subtotal-taking operation the setting pin carriage has to be shifted through four decade steps, it is obvious that the percentage or some other type of multiplier can be entered with another predetermined tenth power magnitude so that the setting pin carriage will have to be shifted another number of decade steps after the subtotal taking operation since in such a case one has only to adapt the distance between the abutment 14 of the slide 13 and the stop abutment 102 of the lever 97 in the position shown in FIG. 3 according to the desired number of decade shifting steps.

I claim:

1. A power-driven calculating machine comprising a multiplier register having a multiplier, a counter, a setting pin carriage with a multiplicand, said register being capable of being shifted into different decade positions in relation to the counter, spring means for shifting said register in one direction and motor means for restoring said register in the other direction, said motor means being under zeroization of said setting pin carriage by a zeroizing mechanism, multiplication means for multiplying the multiplicand by the multiplier by decade shifting of said setting pin carriage and entering of the product onto said counter, a preselecting mechanism operable on multiplication before the actuation of said multiplicationoperating means for retaining the product in the counter after a multiplying operation as a subtotal, an adding and subtracting means for positive or negative adding of a number inserted in said setting pin carriage to a number in said counter, presetting means connectable with the setting pin carriage by actuation of preset operating means after insertion of the multiplicand in the setting pin carriage but before operation of the multiplication means, said presetting means being capable upon adjustment of said setting pin carriage after the multiplying operation, of stopping said carriage in the decade position occupied after insertion of the multiplicand but before the multiplying operation, and shift means operable by said preselection operating means for shifting said setting pin carriage, in the shifting direction a definite number of decade positions after insertion of the product in the counter but before the adding mechanism is enabled by said adding and subtracting means so that the multiplicand can be positively or negatively added to the product in the counter in a definite decade position in relation to said product.

2. A power-driven calculating machine as claimed in claim 1, including a slide having an abutment connectable with said setting pin carriage by means of said presetting means so as to take part in the movements of the carriage, and a stop abutment insertable into the path of motion of the slide abutment by said shift mechanism to arrest said slide abutment so that the setting pin carriage is in a definite position when said carriage is shifted by means of the shift means.

3. A power-driven calculating machine as claimed in claim 1, including a zero fillout mechanism actuable by means of said shift means for entering zeros into the setting pin carriage after the multiplicand when said carriage is shifted by means of said shift means. 

1. A power-driven calculating machine comprising a multiplier register having a multiplier, a counter, a setting pin carriage with a multiplicand, said register being capable of being shifted into different decade positions in relation to the counter, spring means for shifting said register in one direction and motor means for restoring said register in the other direction, said motor means being under zeroization of said setting pin carriage by a zeroizing mechanism, multiplication means for multiplying the multiplicand by the multiplier by decade shifting of said setting pin carriage and entering of the product onto said counter, a preselecting mechanism operable on multiplication before the actuation of said multiplication-operating means for retaining the product in the counter after a multiplying operation as a subtotal, an adding and subtracting means for positive or negative adding of a number inserted in said setting pin carriage to a number in said counter, presetting meaNs connectable with the setting pin carriage by actuation of preset operating means after insertion of the multiplicand in the setting pin carriage but before operation of the multiplication means, said presetting means being capable upon adjustment of said setting pin carriage after the multiplying operation, of stopping said carriage in the decade position occupied after insertion of the multiplicand but before the multiplying operation, and shift means operable by said preselection operating means for shifting said setting pin carriage, in the shifting direction a definite number of decade positions after insertion of the product in the counter but before the adding mechanism is enabled by said adding and subtracting means so that the multiplicand can be positively or negatively added to the product in the counter in a definite decade position in relation to said product.
 2. A power-driven calculating machine as claimed in claim 1, including a slide having an abutment connectable with said setting pin carriage by means of said presetting means so as to take part in the movements of the carriage, and a stop abutment insertable into the path of motion of the slide abutment by said shift mechanism to arrest said slide abutment so that the setting pin carriage is in a definite position when said carriage is shifted by means of the shift means.
 3. A power-driven calculating machine as claimed in claim 1, including a zero fillout mechanism actuable by means of said shift means for entering zeros into the setting pin carriage after the multiplicand when said carriage is shifted by means of said shift means. 